I think this months long conflict is absolutely hurting our decades long relationship with Israel. The U.S. has significant influence in Israel. That's our most potent "weapon" in this conflict at this time. Israel doesn't need our money to continue killing Palestinians. They don't need the next weapons sale from us to continue killing Palestinians. Have we even given them any weapons or financial aid in the last couple months?
Your reaction to this is childish and simple. The U.S. is talking to Israel leadership every day and pleading for restraint. If we just walked away we would lose any influence that we could possibly have moving forward. If the U.S. cut ties with Israel that wouldn't stop them, it could very possibly make them kill Palestinians with more urgency.
And let's not forget, what is happening right now is exactly what Hamas wanted to happen when they attacked on Oct. 7th. This is the outcome Hamas was looking for.